Each group needs:

• LEGO MINDSTORMS EV3 robot, such as EV3 Core Set (5003400) at https://education.lego.com/en-us/products/lego-mindstorms-education-ev3-core-set/5003400#lego-mindstorms-education-ev3
• LEGO MINDSTORMS Education EV3 Software 1.2.1, free online, you have to register a LEGO account first; at https://www.lego.com/en-us/mindstorms/downloads/download-software
• LEGO EV3 Intelligent Brick, available at https://shop.lego.com/en-US/EV3-Intelligent-Brick-45500
• Molecular modeling kit to build atoms with bonds (for example, Molecular Visions: The Flexible Molecular Module Kit, part #595, available at https://www.etsy.com/listing/99279210/molecular-visions-the-molecular-model)
• color sensor (included in the molecular modeling kit)
• ultrasonic sensor (included in the molecular modeling kit)
• 3 plastic sticks (included in the molecular modeling kit)
• 2 plastic balls of the same size (0.5 inch to 3 inches diameter; included in the molecular modeling kit)
• 1 Styrofoam ball, larger in size than the two plastic balls (such as 4 inches in diameter; available at arts and crafts stores)
• 2 sheets of the same colored construction paper, enough to cover a Styrofoam ball
• tape or glue, to adhere the paper to the ball, and the sticks to the motors
• Molecular Modeling Worksheet, one per person

To share with the entire class:

• computer, loaded with EV3 1.2.1 software
• LEGO MINDSTORMS EV3 data logging program (comes with the LEGO EV3 programming software)
• ChemDraw software (download a free trial version at http://scistore.cambridgesoft.com/ScistoreSoftwareDisplay.aspx?VendorID=1; refer to the CS ChemDraw User's Guide at https://revvitysignals.com/products/research/chemdraw?gclid=Cj0KCQjwzdOlBhCNARIsAPMwjbxdE-sgLTcJwZP0DxRCrP0MYaILdFwrVZYNDqO58vgurEUEzlU2zEMaAvPeEALw_wcB)
• Note: one computer per group is ideal, but if only one computer is available, then conduct the activity with the entire class a group.

Note: This activity can also be conducted with the older (and no longer sold) LEGO MINDSTORMS NXT set instead of EV3; see below for those supplies:

• LEGO MINDSTORMS NXT robot, such as the NXT Base Set
• computer, loaded with NXT 2.1 software